After doing some digging in the recently released iOS 6 beta and playing around and tweaking the iOS Simulator app, 9to5Mac discovered that the upcoming Apple iOS scales up to a 640×1136 display.

Today, we have found more proof that Apple is at least testing next-generation iPhone displays that are taller. In fact, iOS 6 is completely scaleable to a taller display.

Thanks to some tweaks to the iOS Simulator application that is included in the iOS development tools, we were able to run the simulator at the rumored next-generation iPhone display resolution of 640 x 1136. We did this running both the current public release of iOS 5.1 and the upcoming iOS 6.0 The iOS 5.1 simulator displayed the home screen with a stretched set of four rows of icons. On the other hand, iOS 6 displayed five complete rows – as our sources said Apple was testing for taller iPhone displays.